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/*
Copyright (c) 2006-2012 Red Hat, Inc. <http://www.redhat.com>
This file is part of GlusterFS.
This file is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3 or
later), or the GNU General Public License, version 2 (GPLv2), in all
cases as published by the Free Software Foundation.
*/
#ifndef _GLUSTERD_SM_H_
#define _GLUSTERD_SM_H_
#include <pthread.h>
#include <glusterfs/compat-uuid.h>
#include "rpc-clnt.h"
#include <glusterfs/glusterfs.h>
#include <glusterfs/call-stub.h>
#include <glusterfs/byte-order.h>
#include "rpcsvc.h"
#include <glusterfs/store.h>
#include "glusterd-rcu.h"
typedef enum gd_quorum_contribution_ {
QUORUM_NONE,
QUORUM_WAITING,
QUORUM_DOWN,
QUORUM_UP
} gd_quorum_contrib_t;
typedef enum glusterd_friend_sm_state_ {
GD_FRIEND_STATE_DEFAULT = 0,
GD_FRIEND_STATE_REQ_SENT,
GD_FRIEND_STATE_REQ_RCVD,
GD_FRIEND_STATE_BEFRIENDED,
GD_FRIEND_STATE_REQ_ACCEPTED,
GD_FRIEND_STATE_REQ_SENT_RCVD,
GD_FRIEND_STATE_REJECTED,
GD_FRIEND_STATE_UNFRIEND_SENT,
GD_FRIEND_STATE_PROBE_RCVD,
GD_FRIEND_STATE_CONNECTED_RCVD,
GD_FRIEND_STATE_CONNECTED_ACCEPTED,
GD_FRIEND_STATE_MAX
} glusterd_friend_sm_state_t;
typedef struct glusterd_peer_state_info_ {
glusterd_friend_sm_state_t state;
struct timeval transition_time;
} glusterd_peer_state_info_t;
typedef struct glusterd_peer_hostname_ {
char *hostname;
struct cds_list_head hostname_list;
} glusterd_peer_hostname_t;
typedef struct glusterd_sm_transition_ {
int old_state;
int event;
int new_state;
time_t time;
} glusterd_sm_transition_t;
typedef struct glusterd_sm_tr_log_ {
glusterd_sm_transition_t *transitions;
size_t current;
size_t size;
size_t count;
char *(*state_name_get)(int);
char *(*event_name_get)(int);
} glusterd_sm_tr_log_t;
struct glusterd_peerinfo_ {
uuid_t uuid;
char uuid_str[50]; /* Retrieve this using
* gd_peer_uuid_str ()
*/
glusterd_peer_state_info_t state;
char *hostname;
struct cds_list_head hostnames;
int port;
struct cds_list_head uuid_list;
struct cds_list_head op_peers_list;
struct rpc_clnt *rpc;
rpc_clnt_prog_t *mgmt;
rpc_clnt_prog_t *peer;
rpc_clnt_prog_t *mgmt_v3;
int connected;
gf_store_handle_t *shandle;
glusterd_sm_tr_log_t sm_log;
gf_boolean_t quorum_action;
gd_quorum_contrib_t quorum_contrib;
gf_boolean_t locked;
gf_boolean_t detaching;
/* Members required for proper cleanup using RCU */
gd_rcu_head rcu_head;
pthread_mutex_t delete_lock;
uint32_t generation;
};
typedef struct glusterd_peerinfo_ glusterd_peerinfo_t;
typedef struct glusterd_local_peers_ {
glusterd_peerinfo_t *peerinfo;
struct cds_list_head op_peers_list;
} glusterd_local_peers_t;
typedef enum glusterd_ev_gen_mode_ {
GD_MODE_OFF,
GD_MODE_ON,
GD_MODE_SWITCH_ON
} glusterd_ev_gen_mode_t;
typedef struct glusterd_peer_ctx_args_ {
rpcsvc_request_t *req;
glusterd_ev_gen_mode_t mode;
dict_t *dict;
} glusterd_peerctx_args_t;
typedef struct glusterd_peer_ctx_ {
glusterd_peerctx_args_t args;
uuid_t peerid;
char *peername;
uint32_t peerinfo_gen;
char *errstr;
} glusterd_peerctx_t;
typedef enum glusterd_friend_sm_event_type_ {
GD_FRIEND_EVENT_NONE = 0,
GD_FRIEND_EVENT_PROBE,
GD_FRIEND_EVENT_INIT_FRIEND_REQ,
GD_FRIEND_EVENT_RCVD_ACC,
GD_FRIEND_EVENT_LOCAL_ACC,
GD_FRIEND_EVENT_RCVD_RJT,
GD_FRIEND_EVENT_LOCAL_RJT,
GD_FRIEND_EVENT_RCVD_FRIEND_REQ,
GD_FRIEND_EVENT_INIT_REMOVE_FRIEND,
GD_FRIEND_EVENT_RCVD_REMOVE_FRIEND,
GD_FRIEND_EVENT_REMOVE_FRIEND,
GD_FRIEND_EVENT_CONNECTED,
GD_FRIEND_EVENT_NEW_NAME,
GD_FRIEND_EVENT_MAX
} glusterd_friend_sm_event_type_t;
typedef enum glusterd_friend_update_op_ {
GD_FRIEND_UPDATE_NONE = 0,
GD_FRIEND_UPDATE_ADD,
GD_FRIEND_UPDATE_DEL,
} glusterd_friend_update_op_t;
struct glusterd_friend_sm_event_ {
struct cds_list_head list;
uuid_t peerid;
char *peername;
void *ctx;
glusterd_friend_sm_event_type_t event;
};
typedef struct glusterd_friend_sm_event_ glusterd_friend_sm_event_t;
typedef int (*glusterd_friend_sm_ac_fn)(glusterd_friend_sm_event_t *, void *);
typedef struct glusterd_sm_ {
glusterd_friend_sm_state_t next_state;
glusterd_friend_sm_ac_fn handler;
} glusterd_sm_t;
typedef struct glusterd_friend_req_ctx_ {
uuid_t uuid;
char *hostname;
rpcsvc_request_t *req;
int port;
dict_t *vols;
} glusterd_friend_req_ctx_t;
typedef struct glusterd_friend_update_ctx_ {
uuid_t uuid;
char *hostname;
int op;
} glusterd_friend_update_ctx_t;
typedef struct glusterd_probe_ctx_ {
char *hostname;
rpcsvc_request_t *req;
int port;
dict_t *dict;
} glusterd_probe_ctx_t;
int
glusterd_friend_sm_new_event(glusterd_friend_sm_event_type_t event_type,
glusterd_friend_sm_event_t **new_event);
int
glusterd_friend_sm_inject_event(glusterd_friend_sm_event_t *event);
int
glusterd_friend_sm_init();
int
glusterd_friend_sm();
void
glusterd_destroy_probe_ctx(glusterd_probe_ctx_t *ctx);
void
glusterd_destroy_friend_req_ctx(glusterd_friend_req_ctx_t *ctx);
char *
glusterd_friend_sm_state_name_get(int state);
char *
glusterd_friend_sm_event_name_get(int event);
int
glusterd_broadcast_friend_delete(char *hostname, uuid_t uuid);
void
glusterd_destroy_friend_update_ctx(glusterd_friend_update_ctx_t *ctx);
#endif
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